Load Patents (Class 188/195)
  • Patent number: 10118630
    Abstract: A truck mounted braking system is provided with a mechanical pivot adjustment on a lever connected to the brake actuator to permit the braking force applied to the wheels to vary depending on the lading condition of the car, without involving additional pneumatic elements such as a pneumatic empty load device. The system adjusts the braking force applied when the hand brake is activated, even when the railway car is disconnected from the pneumatic brake line.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: November 6, 2018
    Assignee: STRATO, INC.
    Inventor: Jonathan Sunde
  • Patent number: 10001159
    Abstract: Systems and methods for brake cable adjustment are disclosed herein. In this regard, a gage block tool for adjusting a brake cable may comprise a body comprising, a first member extending in a first direction, the first member having a first length and a first thickness, and a second member extending in a second direction, the second member having a second length and a second thickness. At least one of the first member or the second member may be sized and configured to be placed between a stop and a lever of a brake valve, the brake cable connected between the lever and a brake handle being properly adjusted when the gage block sandwiched between the lever and the stop contacts both the lever and the stop while the brake handle is in a park lock position.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: June 19, 2018
    Assignee: Goodrich Corporation
    Inventor: John Swank
  • Patent number: 9789860
    Abstract: A method for determining a likely internal pressure for a master brake cylinder including: estimating/measuring a displacement path(s) of a brake input element configured on a master cylinder from initial position thereof; estimating/measuring a first hydraulic fluid volumetric flow rate of a hydraulic fluid of the braking system out of or into a first pressure chamber of the master cylinder, and of a second hydraulic fluid volumetric flow rate of the hydraulic fluid out of or into a second pressure chamber of the master cylinder; and determining the likely internal pressure for a master cylinder considering the estimated/measured displacement path(s), the estimated and/or measured first hydraulic fluid volumetric flow rate, and the estimated and/or measured second hydraulic fluid volumetric flow rate. Also described is a device for determining a likely internal pressure for a master brake cylinder, and an electromechanical brake booster, ESP control, and vehicle braking system.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: October 17, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventor: Michael Bunk
  • Patent number: 9610931
    Abstract: An adaptive braking system for a motor vehicle includes an assisted braking system and a controller arranged to determine, in response to one or more driving condition parameters and in advance of a brake application, the braking assistance to be provided. Braking assistance is defined by a function which maps a brake actuation parameter to be applied from a detected brake pedal actuation parameter. Each driving condition parameter includes an environmental condition parameter. The controller may also adjust the braking assistance in response to one or more braking response signals.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: April 4, 2017
    Assignee: BENTLEY MOTORS LIMITED
    Inventors: Deaglan O'Meachair, Matthew Crumpton
  • Patent number: 9341537
    Abstract: A system, method, and apparatus for certifying an end-of-train device pressure calibration is provided. The system includes a pressure calibration device configured to output a regulated pressure; and an end-of-train device comprising: a brake pipe interface adapted to receive the regulated pressure from the pressure calibration device; and a pressure sensing device configured to obtain a measured pressure by measuring the regulated pressure. At least one of the pressure calibration device and the end-of-train device comprises at least one controller configured to determine a calibration certification result based at least partially on a difference between the measured pressure and the regulated pressure.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 17, 2016
    Assignee: Wabtec Holding Corp.
    Inventors: Padam D. Swar, Brian E. Kurz
  • Patent number: 8918261
    Abstract: Various embodiments provide braking systems and methods for a motor vehicle. One braking system includes a primary braking system, a speed sensor, a brake pedal, a parking brake, and a processor coupled to the parking brake and the primary braking system. The processor is configured to engage the primary braking system when the parking brake is activated and the motor vehicle is traveling at a speed at least equal to a pre-determined speed.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: December 23, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Adam Busack, Eric E. Krueger
  • Patent number: 8733848
    Abstract: A vehicular braking apparatus including a shut-off valve for shutting off, as needed, a flow of oil from a wheel cylinder to a master cylinder; a pressure increase-decrease control valve increasing and decreasing a pressure in the wheel cylinder; a reservoir receiving and storing in a reservoir chamber the oil from the wheel cylinder when the pressure increase-decrease control valve is in a pressure decrease position; a pump sucking in and pressuring the oil from the reservoir chamber and supplying the oil to the wheel cylinder via the pressure increase-decrease control valve when the pressure increase-decrease control valve is in a pressure increase position; and a communication control valve controlling communication between the master cylinder and the reservoir chamber. The communication control valve is a normally-closed valve and is opened by a suction pressure of the pump.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: May 27, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroshi Isono, Yasuji Mizutani
  • Patent number: 8708430
    Abstract: A pneumatic vehicle brake system includes first and second groups of wheel brakes belonging, respectively, to first and second brake circuits having first and second compressed air storage tanks for providing first and second stored pressures. At least one first circuit brake cylinder is a combined spring-store/diaphragm cylinder with a spring store part for providing a parking brake and a diaphragm part for providing a service brake. If the first circuit fails, the spring store part is deaerated to engage the parking brake. A pressure sensor for measuring the first stored pressure is connected to a control unit that controls a modulator for aerating and deaerating the spring store part. The control unit generates a signal for an electrically actuatable modulator solenoid valve if the value measured by the sensor falls below a minimum value, such that the spring store part can be aerated and deaerated via the valve.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: April 29, 2014
    Assignee: WABCO GmbH
    Inventors: Uwe Bensch, Jörg Helmer, Bernd-Joachim Kiel, Hartmut Rosendahl
  • Patent number: 8380400
    Abstract: An HV-ECU performs a program including the steps of: determining whether or not the HV-ECU is in an auto-P execution state; determining whether or not a predetermined time period Tb has elapsed since an auto-P was requested; and permitting determination of the shifting operation if the HV-ECU is in the auto-P execution state and if it is determined that the predetermined time period Tb has elapsed since the auto-P was requested.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: February 19, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Osamu Kanai, Takahiko Tsutsumi, Ichiro Kitaori
  • Publication number: 20080210503
    Abstract: A motor vehicle brake power proportioning device has a brake control force proportioned by a balance-beam-type device at a variable ratio onto different brake cylinders, particularly to the master brake cylinders of the front and rear axle of the motor vehicle. The balance-beam-type device is configured so that a lever arm adjustment, that is continuously a function of the brake control force, can be achieved for a constant course of the proportioning of the brake control force onto the brake cylinders. For achieving the lever arm adjustment as a function of the brake control force, at least one section of the balance-beam-type device is continuously deformable as a function of the brake control force.
    Type: Application
    Filed: February 27, 2008
    Publication date: September 4, 2008
    Applicant: Dr. Ing. h.c.F. Porsche Aktiengesellschaft
    Inventor: Thomas GARBE
  • Publication number: 20070199777
    Abstract: Faces of a rim portion 20b of a brake shoe 20 of a drum brake brought into contact with a backing plate 18 on a side of a wheel cylinder and on a side of an anchor are brought into contact with and supported by first ledge portions “b”, “c” formed at an upper face of the backing plate, and a face of the rim portion 20b of the brake shoe 20 formed substantially at a center position thereof and brought into contact with the backing plate 18 is brought into contact with and supported by a second ledge portion “a” formed at a lower face of a cut-to-rise portion 18a of the backing plate 18.
    Type: Application
    Filed: February 26, 2007
    Publication date: August 30, 2007
    Inventor: Hironori Akada
  • Patent number: 7182185
    Abstract: The invention relates to a disk brake, in particular for utility vehicles, comprising a brake caliper, which extends over a brake disk, an application device located in the brake caliper for applying the brake pads on both sides of the brake disk in the direction of the latter, in addition to at least one adjusting system located in the brake caliper for compensating wear and tear on the brake pad and/or disk. The disk brake is characterized in that the adjusting system is configured on one or both sides of the brake disk as a preassembled adjuster module, which has at least the following components: an electromotor, which acts as the drive, or a drive connection to an electromotor and a reduction gear connected downstream of the electromotor, the rotative drive being fitted onto the mounting plate(s).
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: February 27, 2007
    Assignee: Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbH
    Inventors: Johann Baumgartner, Dieter Bieker, Wolfgang Pahle
  • Patent number: 6915884
    Abstract: A braking system for a vehicle with air suspension, where a brake sensor amplification factor increases in proportion to an increase in gross vehicle weight is provided. The braking performance may vary within a predetermined range. Further, a load sensing arrangement for the braking system may include a pressure sensor for detecting an air pressure in an air suspension, a variable throttling valve for controlling the flow of brake fluid to a brake actuator, and a control means to vary the throttling effect of the throttling valve based on an output of the pressure sensor.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: July 12, 2005
    Assignee: Glide-Rite Products Limited
    Inventor: Mark Glazier
  • Patent number: 6733090
    Abstract: In a hydraulic vehicle braking systems operable via hydraulic external energy from a pump or, in the event the pump malfunctions, via hydraulic energy made available using a master brake cylinder via muscle-powered energy, provision is made for safe braking via muscle-powered energy such that at least one cylinder-piston configuration isolates at least two wheel brakes from the hydraulic pressure medium that is able to be pumped by the pump. The hydraulic vehicle-braking system incorporates wheel brakes of one axle that is isolated from a hydraulic pump in terms of pressure medium by a cylinder-piston configuration, which wheel brakes are supplied with pressure medium by one master cylinder chamber of a master brake cylinder. The other master brake cylinder chamber is allocated to the two other wheel brakes of the other vehicle axle, so that given bubble-free pressure medium downstream from the pump, the wheel brakes of both vehicle axles make a contribution to vehicle deceleration.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: May 11, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Willem-Remco Pasterkamp, Werner Quirant
  • Patent number: 6725983
    Abstract: A vehicle suspension assembly includes a shock absorber that provides variable damping dependent on the load conditions of the vehicle. A central rod of the shock absorber includes a central bore that is fluidly coupled with air pressure within air springs of the suspension assembly. As the vehicle load increases and the pressure within the air springs increases, a damping adjustment assembly within the shock absorber increases the stiffness or damping of the shock absorber. In one example, a plunger moves within the central bore in the rod between a first position where less damping is provided and a second position where increased damping is achieved. A unique adapter member facilitates using a rod of appropriate size to achieve the desired air pressure conditions within the rod, while at the same time supporting conventional piston and disc valve components and providing enough material strength to withstand the tensile loads experienced under full extension.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: April 27, 2004
    Assignee: Meritor Heavy Vehicle Technology, LLC
    Inventor: Stephen H. Bell
  • Publication number: 20030029680
    Abstract: An electrically actuated aircraft brake system and method which provides for brake wear measurement, brake running clearance adjustment, ram position-based control and improved construction and operation. Brake wear and running clearance measurement are obtained by analyzing the output of position sensing circuitry. The position sensing circuitry, preferably including a LVDT position sensor, is also used to determine braking load, a brake controller including circuitry for effecting displacement of one or more reciprocating rams to load a brake disk stack by a predetermined amount based on a present displacement value of the position signal obtained from the position sensor. The position sensor preferably includes a LVDT transducer connected between the reciprocating ram and a brake housing, and the motive device preferably includes a servo motor.
    Type: Application
    Filed: October 10, 2002
    Publication date: February 13, 2003
    Inventors: Mihai Ralea, Franklin C. Christ
  • Patent number: 6447075
    Abstract: A compressed air operable wheeled trailer braking system includes a braking electronic control unit (ECU) having an electronically operable control valve which derives suitably proportioned load and vehicle speed dependent service brake pressure for brake chambers of the trailer wheeled. The braking ECU has a data memory storing specific braking parameters normally installed therein prior to commissioning the trailer. The trailer has a further diagnostic ECU responsive to vehicle operational sensors, the further ECU also having memory capacity. The specific braking parameters are stored via a communication link consequent upon installation thereof to the braking ECU. Upon recognizing installation of a replacement braking control unit, the parameters from the further ECU are installed in the replacement ECU.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: September 10, 2002
    Assignee: Knorr-Bremse Systems for Commercial Vehicles Limited
    Inventors: Colin Ford Ross, Matthew John Fry
  • Patent number: 6412759
    Abstract: The invention relates to a system which includes an air spring (2) which, in turn, encloses an air volume (16). The system also includes a controllable shock absorber (4) connected in parallel to the air volume. Furthermore, the system includes an ancillary volume (22) with which the air volume (16) of the air spring (2) is connected via a controllable throttle (20). The stiffness and the total damping of the system can be pregiven via a control of the throttle (20) and of the controllable shock absorber (4) independently of each other.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: July 2, 2002
    Assignee: Continental Aktiengesellschaft
    Inventor: Hans-Peter Krauss
  • Publication number: 20010032760
    Abstract: A knob arrangement for operating parking brakes intended for use in vehicles comprising brake units and an electrically operated tensioning means for applying or releasing braking force to said brake units. According to the invention, a means is arranged to sense the position of the knob and to send control signals to a first electric motor which is arranged to power said tensioning means for generating a braking force corresponding to the position of the knob. The knob is manually adjustable and, in a fully applied position, at maximum braking force, mechanically lockable. A control motor is arranged to automatically displace the knob to the fully applied and mechanically locked position dependent on second control signals applied to the motor. In its fully applied, locked position the knob is only releasable from the locked position by manual operation.
    Type: Application
    Filed: March 31, 2001
    Publication date: October 25, 2001
    Inventors: Peter Astrom, Daniel Berglund
  • Patent number: 6305756
    Abstract: An empty/load brake control system mountable on a sprung and an unsprung member of a railway car and disposed between the car brake control valve and brake cylinder for adjusting the brake cylinder pressure during a brake application according to the car load condition. Such system includes an empty/load sensor valve device and a sensor arm coupled to a sensor cable whose movement is controlled by a sprung member and a terminal member disposed on an end of sensor cable, in contact with sprung member so that any downward movement of sprung member forces such terminal member in a similar downward direction and similarly pulls on the sensor cable. A piston, under pressure, urges the sensor arm to rotate and retract sensor cable but must overcome resistance of a spring. The system includes a load proportional valve.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: October 23, 2001
    Assignee: Westinghouse Air Brake Company
    Inventors: Daniel G. Scott, Mark S. Krampitz
  • Patent number: 6302496
    Abstract: The present invention relates to a load-responsive brake force regulator which, for the installation into the vehicle, has a clearance compensation element in the shape of an elastomeric element that automatically moves the actuating lever into the required stop position. After the installation of the brake force regulator into the vehicle, a fixing device is fixed on the pin by means of a screw so that a defined distance is adjusted between the housing of the brake force regulator and the end of a load-responsively acting tension spring. The rubber band is redundant after the fixation. In contrast to the state of the art which proposes the provision of a clearance compensation spring on the lever-side end of the pin and, after fixation, the dissection of the pin at its redundant end by way of a nominal breaking point, the present invention prevents damage to the pin due to transport or improper handling because no nominal breaking point is required.
    Type: Grant
    Filed: October 20, 1999
    Date of Patent: October 16, 2001
    Assignee: Continental Teves AG & Co., Ohg
    Inventors: Willi Hartmann, Johann Ludwig
  • Patent number: 6273524
    Abstract: A braking force control valve for an air brake system. The air brake system includes an air compressor for generating compressed air, an air tank for storing the compressed air supplied from the air compressor, an air bellows connected to the air tank, a load sensing valve connected to the air bellows to equilibrate braking force applied to front and rear wheels of the vehicle, a brake valve for operating the load sensing valve, a brake chamber for supplying braking force by receiving the compressed air from the air tank when the brake valve is operated. The braking force control valve comprises a valve body provided with a first port connected to the air tank, a second port connected to the air bellows, a third port connected to the load sensing valve, and a valve mechanism for selectively connecting the third port to either the first port or the second port according to a height variation between a body and an axle shaft of the vehicle.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: August 14, 2001
    Assignee: Hyundai Motor Company
    Inventor: Gi-Won Kang
  • Patent number: 6217130
    Abstract: A continuously variable load responsive brake pressure control valve controls the amount of brake pipe pressure for a railway vehicle. The system also includes an isolator therefor for isolating the load sensor therefor from transient inputs caused by normal vehicle motion. A spring loaded isolator coupled with a matched hydraulic cylinder isolate wheel truck deflections with respect to the car body, preventing erroneous inputs to the load sensor of the variable load braking system so as to provide more accurate brake cylinder pressure according to vehicle load weight. The variable load limiting valve is continuously operable between an empty vehicle condition and a fully loaded vehicle condition and assures a minimum braking pressure, while also helping prevent sticking of the brakes.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: April 17, 2001
    Assignee: Westinghouse Air Brake Technologies Corporation
    Inventor: Thomas Engle
  • Patent number: 6206483
    Abstract: An empty-load device with an additional brake cylinder test port which is at the same pressure as the brake cylinder port of the empty-load device. The empty-load device includes a housing and pipe bracket having a brake cylinder, a control valve and brake cylinder test ports. The brake cylinder port and the brake cylinder test port are on one side of the valve seat of the load responsive valve and the control valve port is on an opposite side of the valve seat. A check valve is provided in the brake cylinder test port which is opened when a connector is mated with a brake cylinder test port.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: March 27, 2001
    Assignee: New York Air Brake Corporation
    Inventor: Luann M. LaLone
  • Patent number: 6089679
    Abstract: A braking system for braking a motor vehicle by the front and rear brakes of the vehicle's front and rear wheels, respectively, including a distribution control device for controlling a distribution of front and rear wheel braking force produced by the respective front and rear brakes, according to a selected one of a first and a second distribution pattern, each of which represents the front and rear wheel braking forces in relation to each other wherein the rear wheel braking force defined by the second distribution pattern is larger than that defined by the first distribution pattern at least when the front and rear wheel braking forces are smaller than respective predetermined values. The selection of the two distribution patterns may be dependent on vehicle load.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: July 18, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Naoto Kushi, Tatsuo Sugitani, Kiyoyuki Uchida, Kenji Ito, Takashi Kondo, Yoshinori Kadowaki
  • Patent number: 6079795
    Abstract: A continuously variable load responsive brake pressure control valve controls the amount of brake pipe pressure for a railway vehicle. The system also includes an isolator for isolating the load sensor from transient inputs caused by normal vehicle motion. A spring loaded isolator coupled with a matched hydraulic cylinder isolate wheel truck deflections with respect to the car body, preventing erroneous inputs to the load sensor of the variable load braking system so as to provide more accurate brake cylinder pressure according to vehicle load weight. The variable load limiting valve is continuously operable between an empty vehicle condition and a fully loaded vehicle condition and assures a minimum braking pressure, while also helping prevent sticking of the brakes.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: June 27, 2000
    Assignee: Westinghouse Air Brake Technologies Corporation
    Inventor: Thomas Engle
  • Patent number: 6027180
    Abstract: A manual shifting apparatus for an automatic empty/load brake device used in conjunction with a pneumatic braking system provided on a transport vehicle having a truck and a car body mounted thereon through a resilient suspension system. The automatic empty/load brake device has a sensor arm which moves through a range of positions upon the application of a braking force to the transport vehicle by the pneumatic braking system. The range of positions includes a first range of positions indicating the transport vehicle as being in a loaded condition and a second range of positions indicating the transport vehicle as being in an unloaded condition. The automatic empty/load brake device applies a substantially reduced pneumatic braking force to the transport vehicle whenever the sensor arm is in the second range of positions.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: February 22, 2000
    Assignee: Westinghouse Air Brake Company
    Inventors: William G. Greenaway, James M. Zemyan, Roger V. Lewis
  • Patent number: 5820112
    Abstract: A vehicle cab levelling apparatus includes a spool formed extendedly from the piston so as to shut the exhaustion valve by closely attaching thereto and to open the exhaustion valve by distancing therefrom in accordance with the upward and downward movement of the piston, a slider valve provided on the periphery of the spool so as to move upwardly and downwardly along the axis of the spool, shutting or opening the discharge passage, and a valve operation member for operating in accordance with the upward and downward movement of the lever, and shutting the discharge passages by shifting the slider valve in accordance with supplying an externally provided air into an operation chamber formed by the slider valve.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: October 13, 1998
    Assignee: Hyundai Motor Company
    Inventor: Gitae Kim
  • Patent number: 5716109
    Abstract: The present device is a rear brake pressure reducing system which responds to changes in weight and weight distribution of a vehicle. It has a valve connected to the vehicle's axle by pivotally connected linkages, a bell crank, a sensing spring, and a piston actuating lever. The valve has a bypass duct which provides full hydraulic pressure to the rear brakes in the event the front brake fails.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: February 10, 1998
    Assignee: Hyundai Motor Company
    Inventor: Jinkak Kim
  • Patent number: 5692812
    Abstract: A regulator (1) having a casing (10) with at least one bore (11) therein. A piston (12) slidably located within the bore (11) to delimit first (13) and second (14) chambers. The first (13) and second (14) chambers being separated from one another by a valve (15) carried on the piston (12) and actuated by a push rod (16). Valve (15) include first (151) and second (152) balls which have different diameters and are mounted in line with respect to corresponding first (155) and second (156) seats. First (153) and second (154) springs act on and urge the first (151) and second (152) balls toward the first (155) and second (156) seats.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: December 2, 1997
    Assignee: Bosch Systemes de Freinage
    Inventor: Juan Simon Bacardit
  • Patent number: 5653513
    Abstract: A dual circuit load-conscious-type hydraulic pressure control valve apparatus for a dual circuit brake system of a vehicle, which is installed between a master cylinder and a brake cylinder, which apparatus includes a housing having two hydraulic channels in connection with the master cylinder and the brake cylinder, pair of hydraulic pressure control valves, a pair of plungers, a displacement transmission member for pushing the plungers according to the load responsive displacement of a suspension spring, an equalizer for transferring the force from the displacement transmission member to the pair of hydraulic pressure control valves by pushing the plungers, a supporting shaft to which an end of the displacement transmission member is pivoted so as to transmit the movement of the displacement transmission member to the equalizer, and a return spring, disposed between the equalizer and the displacement transmission member, for detaching the equalizer from the displacement transmission member in the direction
    Type: Grant
    Filed: February 27, 1996
    Date of Patent: August 5, 1997
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Yasushi Kobayashi
  • Patent number: 5615931
    Abstract: At least one measurement device detects the wheel load or axle load of the vehicle on at least one wheel, and an electronic control unit produces control signals for the wheel brakes at least as a function of the braking demand from the driver and of the detected wheel load or axle load selecting from characteristic brake pressure profiles the profile prescribing the required brake pressure based on driver's braking demand and the load state of the vehicle determined from the load state of the wheel or of the axle, and controlling the brakes in accordance with this profile during the braking process.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: April 1, 1997
    Assignee: Robert Bosch GmbH
    Inventors: Werner Stumpe, Andreas Schlichenmaier, Bernhard Schwendemann
  • Patent number: 5595425
    Abstract: A brake pressure control unit of vehicle load responsive type is disposed in a brake pressure line extending from a master cylinder to wheel brake cylinders and composed of a P-valve, a load-sensing lever abutting on a plunger of the P-valve, a secondary spring disposed between the bracket secured to the P-valve and the free end of the lever, and a primary spring disposed between the other free end of the lever and a lower end of a rod which is swingably held on the other free end of the lever. The brake pressure control unit is preassembled as one unit before it is installed in the vehicle as it is. The direction of the biasing force of the secondary spring is the same as that of the primary spring.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: January 21, 1997
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kiyonobu Nagamori, Sigeki Yagami, Hideaki Mitubayashi
  • Patent number: 5560689
    Abstract: An object of the present invention is to decrease the machining cost and to improve the productivity. A liquid pressure control device (21) for load responding brake comprises a valve mechanism (25), which is slidably disposed in a housing (22), for decreasing the liquid pressure of a master cylinder in a predetermined proportion and transmitting the liquid pressure to a rear wheel brake cylinder by the movement of a plunger (24) operated in response to the liquid pressure from the master cylinder; and a load sensing mechanism (27) in which a load depending on the movable load of a vehicle is applied to the plunger (24) so as to move the pressure decrease operation start point of the valve mechanism (25). The housing (22) is formed by cutting a long material (50) formed by extrusion or drawing to a predetermined length and then by machining the cut material (51).
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: October 1, 1996
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Mutsuro Yamakoshi, Shinichi Inagaki
  • Patent number: 5474367
    Abstract: A proportioning valve actuation member (110) for a vehicle (12) having a braking system and a load leveling system has an actuator (22) mounted between the proportioning valve (20) of the braking system and the rear suspension (14) of the vehicle (12). The actuator (22) is operative to increase the amount of braking applied to the rear wheels in response to the movement of the rear suspension (14). The actuation member (110) further includes an activation cylinder (112) which is placed in parallel with the actuator (22) and is in communication with the load leveling system. When the load leveling system activates to correct the attitude of the vehicle (12), the activation cylinder (112) is also signaled to correct the reading provided to the proportioning valve (20) by the actuator (22).
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: December 12, 1995
    Assignee: Monroe Auto Equipment Company
    Inventor: Michael G. Gaines
  • Patent number: 5451098
    Abstract: The compensator comprises, in known manner, a body (1) in which are defined two pressure chambers (2, 3), a piston (4) carrying a valve (6) capable of bringing the chambers into communication with one another, a bearing mechanism (8, 81) and a reaction mechanism. The reaction mechanism comprises a second piston (5) sliding inside the first, a deformable member (8), and a locking mechanism (10, 11), in such a manner that the output pressure (P1) as a function of the input pressure (Po) has more than two slopes.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: September 19, 1995
    Assignee: AlliedSignal Europe Services Techniques
    Inventors: Pierre Pressaco, Roland Levrat
  • Patent number: 5407256
    Abstract: The invention relates to a load-sensitive twin brake power controller whose change-over pressure is determined by a lever through a rocking element. The housing is extruded. Traditionally, a large-volume cylindrical chamber for the accommodation of the rocking element and a circular dust cover seat are mill cut into the housing. Such a loss of material is avoided by the present invention in that in conjunction with the extruded profile section two housing projections are molded which are each provided with one groove. Between the latter the dust cover is pressed with a sheet metal ring against the housing until the sheet metal ring comes to be locked in the grooves.
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: April 18, 1995
    Assignee: Alfred Teves GmbH
    Inventors: Kurt Saalbach, Rudolf Cezanne, Dieter Fueller
  • Patent number: 5403072
    Abstract: A brake-pressure control device is disclosed with a service-brake valve for allocating pressure from a supply source, and via an automatically load-dependent brake-power controller to the wheel-brake cylinders of a rear axle and from a supply source to the wheel-brake cylinders of a front axle of a motor vehicle. Wear sensors are provided for detecting the respective residual lining thickness of the wheel-brake linings, the output signals from the wear sensors being fed to control electronics which, in the event of differing wear of the linings on the two axles, generate a signal for activating a solenoid valve, which corrects the brake pressure on the wheel brakes of one axle. Instead of correcting the brake pressure on the wheel brakes of the respective axle which have greater wear in comparison with the wheel brakes of the other axle, according to the invention a correction of the brake pressure takes place always only on the wheel brakes of one axle only this axle being assigned a solenoid valve.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: April 4, 1995
    Assignee: Mercedes-Benz AG
    Inventors: Ulrich Kilian, Hannes Wahle, Karl Kuhn
  • Patent number: 5275265
    Abstract: The invention relates to a brake-booster (10) of a vehicle, comprising a casing (12) and a diaphragm (14) which divides in a sealed manner the interior of the casing into a front chamber (16) and a back chamber (18), a hollow piston (20) movable in the casing receiving an input member (24) adapted to be connected to a brake pedal, an output assembly comprising a lid (30) and an output rod (32) adapted to be connected to a piston (34) of a master cylinder (36), a reaction disk (28) in a deformable material arranged between the hollow piston (20) and the lid (30) so as to receive an image of the output force of the booster (10) when it is put into operation in order to cause a deformation of the reaction disk (28) tending to push back the input member (24) as a function of the image.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: January 4, 1994
    Assignee: Bendix Europe Services Techniques
    Inventor: Philippe Castel
  • Patent number: 5269595
    Abstract: An empty/load changeover valve device for a railway car having a proportioning valve via which the car control valve supplies brake cylinder pressure. The proportioning valve comprises a balance piston having equal opposing pressure areas and a combined supply and release check valve, one pressure area of the balance piston being subject to air pressure supplied to the brake cylinder under all conditions of loading. The opposing pressure area of the balance piston is either pressurized or depressurized depending upon the car being in an "empty" or "load" condition, thereby establishing either a nonproportioning or a proportioning mode of brake control. Integrating the release check valve with the supply valve so as to have a smaller effective pressure area, the release check valve can be opened with low force to exhaust brake cylinder pressure during brake release, thereby making possible a reduced size empty/load changeover valve device.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: December 14, 1993
    Assignee: Westinghouse Air Brake Company
    Inventors: Albert A. McKay, James E. Hart
  • Patent number: 5259666
    Abstract: The invention relates to a double brake booster for a motor vehicle, provided with a valve enabling the boost ratio to be varied as a function of the load of the vehicle. In addition to two pistons (64, 66) articulated to an arm (72), this valve comprises a pusher (80) driven by a third piston (68), to a first face of which is applied a first force representative of the load of the vehicle and to a second face of which is applied a second force of elastic nature, in opposition to the first, this third piston adopting, under the effect of the first and second forces, an equilibrium position which determines that of a variable bearing point for the lever which constitutes the arm (72). Moreover, the arm, the pusher and the three pistons are mounted in the same body, the arm and the pusher being housed in a single cavity (74) which is defined in this body and subjected to a low pressure, and toward which the second faces of the three pistons are turned.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: November 9, 1993
    Assignee: Bendix Europe Services Techniques
    Inventor: Philippe Castel
  • Patent number: 5257856
    Abstract: Disclosed herein is a method of and a system for controlling brakes. In the brake control system, grounding loads on front and rear wheels are determined and a correction value for the braking of a predetermined wheel is computed based on the grounding loads thus determined. A braking force is determined inclusive of the computed correction value. A correction value for the braking of the front wheel is computed based on the determined grounding loads. Thus, the optimum brake control can be made without being affected by a variation in the distribution of the loads of the front and rear wheels relative to the ground.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: November 2, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Atsuo Ota, Osamu Suzuki, Takushi Matsuto
  • Patent number: 5236251
    Abstract: A vehicle braking system has a master cylinder, a first brake associated with a front wheel of the vehicle and a second brake (11) associated with a rear wheel of the vehicle, the master cylinder being connected to the first and second brakes in a common circuit. The second brake includes brake actuator (10) with a valve (30, 35) which will vary the rate at which fluid pressure is applied to the brake actuator (10) at a predetermined brake pressure, a spring loaded lever (50) acts on the valve (30, 35) to set the predetermined pressure at which the rate of application of pressure is varied and a linkage mechanism (70) varies to loading of the lever (50) to vary the predetermined pressure in proportion to the load applied to the rear wheel with which the brake (11) is associated.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: August 17, 1993
    Assignee: Automotive Products, plc
    Inventors: David A. Harries, Eric C. Hales, William E. Haines, Kenneth M. Quinney
  • Patent number: 5220982
    Abstract: A dampener for devices such as a leveling valve in which the dampener is a separate self-contained member formed of a piston cylinder part and a cap connected to each other and having a piston mounted in the chamber between the parts. The cylinder chamber occupied by the piston contains a viscous fluid that passes over the edge of the periphery of the inner wall of the chamber as the piston is moved from one end to the other. The two parts of the dampener are preferably constructed of transparent material so that it can be determined whether the space between the piston and the walls of the chamber is completely filled with a viscous fluid or whether there are any air bubbles or the like in the chamber. A temporary opening is provided in the cylinder cap for escape of air when the two parts are connected together. Extending from both sides of the piston are hubs exposed to the exterior of the dampener.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: June 22, 1993
    Assignee: Hadley Products
    Inventor: Henry M. Anderson, Jr.
  • Patent number: 5215171
    Abstract: A load-controlled brake compensator for a vehicle possessing a chassis and at least one axle, includes a fixed part (10) solidly attached to the chassis and comprising at least one compensating valve provided with a pivotingly mounted control lever (12) of which one end is associated with the axle via a preloaded spring device (18) whose length is preset by way of a temporary strut (22) before one of its ends (20) is fixed to the axle, the other end of the spring device being solidly attached to a rod (16) capable of sliding in an opening (14) made in the end of the lever (12). It further comprises an elastic mechanism (24) tending to restore the spring device (18) towards the lever and a locking means (28, 29, 30) allowing the sliding movement of the rod (16) in the opening (14) to be prevented after fixing of the spring device (18) to the axle and before removal of the temporary strut (22).
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: June 1, 1993
    Assignee: Bendix Europe Services Techniques
    Inventors: Marc Longuet, Alain Perrin, Lionel Bourgois
  • Patent number: 5201572
    Abstract: The circuit controlls a fluidically controlled brake regulator (7) in dependence on the load of a vehicle having at least two wheels each provided with a suspension member (1, 2). Each suspension member (1, 2) cooperates with a fluidic pressure sensor (11, 12) to control the regulator (7) in dependence on the load carried by only one of the wheels, namely the wheel carrying the lighter load.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: April 13, 1993
    Assignee: Bendix Europe Services Techniques
    Inventor: Philippe Castel
  • Patent number: 5201571
    Abstract: A bearing piece for a suspension unit of a motor vehicle, acting as a pressure sensor for a fluid-controlled brake regulator and intended to be mounted between a suspension element (12, 14) and a part of the vehicle by way of an elastic bearing (16) or, a pivoting mounting, has a piston mechanism (20) which can move counter to the pressure prevailing in a leaktight chamber (24). A mechanism (30, 34, 36, 40, 42) is provided so that the pressure in the leaktight chamber (24) is greater than a predetermined pressure.
    Type: Grant
    Filed: February 6, 1992
    Date of Patent: April 13, 1993
    Assignee: Bendix Europe Services Techniques
    Inventor: Philippe Castel
  • Patent number: 5176434
    Abstract: The vehicle brake pressure proportioning valve subject to the load of a vehicle and controlled fluidically comprises a piston (18) sliding in a stepped bore made in a body and carrying a normally open shutter arranged between a source of fluid under pressure and an associated brake circuit, the piston (18) being movable counter to a spring under the effect of the pressure of the fluid which tends to close the shutter, and comprising furthermore a sealed control chamber (16) connected to a load sensor (10). The proportioning valve further comprises a normally open additional valve (14) arranged between the chamber (16) and the sensor (10), in order to interrupt communication between the chamber (16) and the sensor (10) during a braking operation.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: January 5, 1993
    Assignee: Bendix Europe Services Techniques
    Inventors: Roland Levrai, Jacques Dufosse
  • Patent number: 5154492
    Abstract: The load sensing brake proportioning valve of a vehicle comprises a first piston (14) sliding in a stepped bore made in a body, and carrying a normally open shutter (18) arranged between a source of fluid under pressure and the associated brake circuit, the first piston (14) being moveable counter to a spring (16) under the effect of the pressure of the fluid which tends to close the shutter (18), a sliding rod (24) normally bearing between a pusher (20), the position of which is a function of the load of the vehicle, and the shutter (18). The proportioning valve comprises a locking mechanism immobilizing the sliding rod (24) as soon as the pressure of the fluid in the associated brake circuit exceeds a specific threshold.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: October 13, 1992
    Assignee: Bendix Europe Services Techniques
    Inventors: Roland Levrai, Philippe Castel, Patrice Moinard
  • Patent number: 5152378
    Abstract: To warn the driver of an automotive vehicle in the event of failure of a component of the actuating apparatus in a brake pressure control device with two control valves which are acted upon by an actuating varied by an actuating variable which is common for both control valves, a separate actuating apparatus is provided for each control valve. The differential pressure between the pressure fluid outlets is permanently monitored.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: October 6, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Jergen Schonlau, Peter Volz, Alfred Birkenbach